Malicious PDF — malware analysis report

Static analysis result for SHA-256 22862e75eb25b725…

MALICIOUS

PDF

87.4 KB Created: 2020-08-11 23:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfb9345b31363d87ddb6c47c769c59f4 SHA-1: 35e10be07b597837ad6d9a001c216a5783945369 SHA-256: 22862e75eb25b725dbe6c062203003a002e471a229e03dba94009ebee8f0fa39
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL. The primary intent appears to be luring the user to the ttraff.ru domain, which is flagged as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=regions+in+the+philippines+list+pdf
    • http://files.groundtruthsalessystem.com/uploads/1/3/2/7/132710779/1732630.pdf
    • http://files.dianegravel.com/uploads/1/3/0/7/130739924/kopep.pdf
    • http://files.kannwoodtimberworks.com/uploads/1/3/2/6/132682833/tejib.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/59933888924.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/structure_of_ebola_virus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2613/files/ligivanukisisatib.pdf
    • https://cdn.shopify.com/s/files/1/0440/4445/2005/files/64674559355.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/99376152244.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/xixesatezaraxivarukoripux.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/tidanadoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3317/2885/files/wolfgang_puck_grill_griddle.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/4058737259.pdf
    • https://cdn.shopify.com/s/files/1/0429/7549/4300/files/retire_early_with_real_estate_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff6a.bin
14d85d8a12e62eaae5e470b1b11021d1ce7695ca7a8554b06e4242cc1cafe1ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6A 5004 bytes
font_01_sfnt_off0001107a.bin
8334a048280603a705d5cf755c457e39ec74b35359fd077fd41f1ee960b9dce4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1107A 13424 bytes
font_02_sfnt_off00013b0c.bin
2ae54feca48abd86b01633827f328d6d7359f632e73dcb89532a8de68b0e710f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0C 16092 bytes